I apparently have sold the Golden Claw, I am not entirely sure where and seem to have lost it. This has stopped me from finishing the quest. I am using the xbox 360 edition
all you got to do is after you sell it to the guy in the riverwood trade store, just walk out wait about a day (or until morning) go back inside and it should be on the counter in front of him. if you sold it to somone else you have to usually buy it back or it might be gone some traders don't hold the items you sell them. So check every trader you have sold things to.